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同仁 - Doujin https://asiamedals.info/threads/doujinkai-history-badges-and-documents.29449/
Original "jewelry" type case without inscription /or inscription was erased/.
Badges were manufactured by the Kobayashi workshop in Tokyo /東京 小林製/.
東京 - Tokyo
D.K. in rhombus
小林製 - Made...
badge made kobayashi watch shop
d. kobayashi watch shop
doujinkai badge
doujinkai red jewel star badge
japanese association for universal benevolence
japanese benevolence badge
japanese universal benevolence association badge
同仁会章
同仁会紅宝星章
小林時計店